Yes, I'd be verrrryyyyy hesitant to purchase an Nvidia card these days if the main goal is folding. FAH appears to be going the opencl route for future WUs and Nvidia doesn't appear to be interested in optimising their cards for opencl because they're more interested in promoting Cuda.

I'm switching my main from BOINC to try the F@H client with the slider bar when my work units are done. I'm surprised I didn't read about it earlier, that F@H now defaults to switching GPU folding off when the computer isn't in use.Folding@home - V7-Intermediate

__________________"The computer programmer says they should drive the car around the block and see if the tire fixes itself." [src]

you should check the gpu.txt file. I know there were some issues with GPU's not being supported when it was first released but since the 7.2.x(I think) release there is a built in feature to automatically update the gpu.txt file. You might want to look into it anyway.

I'm going to have to think long and hard about continuing to fold on all my rigs. I'm currently renting a place that has all utilities included. That will change in a few months, and not only will my rent go up, but I'll be paying utilities, too. I just may not be able to afford to continue folding... :(